Vacuum cleaner in the context of Field coil

A vacuum (pl.: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective vacuus (neuter vacuum) meaning "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a perfect vacuum, which they sometimes simply call "vacuum" or free space, and use the term partial vacuum to refer to an actual imperfect vacuum as one might have in a laboratory or in space. In engineering and applied physics on the other hand, vacuum refers to any space in which the pressure is considerably lower than atmospheric pressure. The Latin term in vacuo is used to describe an object that is surrounded by a vacuum.

The quality of a partial vacuum refers to how closely it approaches a perfect vacuum. Other things equal, lower gas pressure means higher-quality vacuum. For example, a typical vacuum cleaner produces enough suction to reduce air pressure by around 20%. But higher-quality vacuums are possible. Ultra-high vacuum chambers, common in chemistry, physics, and engineering, operate below one trillionth (10) of atmospheric pressure (100 nPa), and can reach around 100 particles/cm. Outer space is an even higher-quality vacuum, with the equivalent of just a few hydrogen atoms per cubic meter on average in intergalactic space.

Cleaning tools include the following:

• Acoustic cleaning
• Air blaster
• Air knife
• Besom
• Broom
• Brush
• Building maintenance unit
• Camel-hair brush
• Carbon dioxide cleaning
• Carpet beater
• Carpet sweeper
• Chamois leather
• Cleret
• Cyclone dust collector
• Dishwasher
• Dry-ice blasting
• Feather duster
• Floor scrubber
• Floorcloth
• Hataki
• Hot water extraction
• Ice blasting (cleaning)
• Laundroid
• Laundry ball
• Lint remover
• Melamine foam
• Microfibre cloth
• Mop
• Mop bucket cart
• NAV-CO₂ system
• Needlegun scaler
• Parts washer
• Peg wood
• Peshtemal
• Pigging
• Pipe cleaner
• Pith wood
• Posser
• Pressure washing
• Propane burnisher
• Pumice
• Reason washing machine
• Scrubber (brush)
• Shaker broom vise
• Silent butler
• Soap shaker
• Sonic soot blowers
• Sponge (material)
• Squeegee
• Steam mop
• Strigil
• Swiffer
• Tawashi
• Thor washing machine
• Tongue cleaner
• Turk's head brush
• Vacuum cleaner
• Vacuum truck
• Vapor steam cleaner
• Wash rack
• Washing machine
• Wire brush

Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor. They are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from which it exits.

Common uses include water, sewage, agriculture, petroleum, and petrochemical pumping. Centrifugal pumps are often chosen for their high flow rate capabilities, abrasive solution compatibility, mixing potential, as well as their relatively simple engineering. A centrifugal fan is commonly used to implement an air handling unit or vacuum cleaner. The reverse function of the centrifugal pump is a water turbine converting potential energy of water pressure into mechanical rotational energy.

A carpet beater or carpetbeater (also referred to as a rug beater or rugbeater, carpet whip, rug whip, clothes-beater, dust beater or dustbeater, carpet duster, wicker slapper, rug duster, or pillow fluffer, and formerly also as a carpet cleaner or rug cleaner) is a housecleaning tool used to beat carpets in order to shake dust and dirt out of them. It was in common use until the vacuum cleaner became widely affordable.

Typically made of wood, rattan, cane, wicker, spring steel or coiled wire, antique rug beaters have become very collectible. Modern mass-production versions can also be in plastic or wire.

A carpet sweeper is a mechanical device for the cleaning of carpets. They were popular before the introduction of the vacuum cleaner and have been largely superseded by them. However, they continue to be used in many home and commercial applications because they are lightweight and quiet, enabling users to quickly clean small messes up from the floor without disturbing patrons, patients, babies and pets, and because they do not require electricity to operate.

Hot Water Extraction (HWE) is a method of carpet cleaning. It involves a combination of hot water and cleaning agents being injected into the fibers of a carpet and the lifted soil being removed by a vacuum. It is sometimes called "steam cleaning".

A robotic vacuum cleaner, sometimes called a robovac or a roomba as a generic trademark, is an autonomous vacuum cleaner which has a limited vacuum floor cleaning system combined with sensors and robotic drives with programmable controllers and cleaning routines. Early designs included manual operation via remote control and a "self-drive" mode which allowed the machine to clean autonomously.

Marketing materials for robotic vacuums frequently cite low noise, ease of use, and autonomous cleaning as main advantages. The perception that these devices are set-and-forget solutions is widespread but not always correct. Robotic vacuums are usually smaller than traditional upright vacuums, and weigh significantly less than even the lightest canister models. However, a downside to a robotic vacuum cleaner is that it takes an extended amount of time to vacuum an area due to its size. They are also relatively expensive, and replacement parts and batteries can contribute significantly to their operating cost. Concerns over privacy and security have also been raised around robotic vacuums.

Henry is the brand name given to a cylinder vacuum cleaner made and sold by Numatic International, and is the only mass-produced consumer vacuum cleaner still made in the United Kingdom. It is most notable for its cartoon eyes and mouth on the body of the vacuum cleaner, making a face, with the hose connector or hose as its nose.

The vacuum cleaner has several variations, including different names on the cap (including Hetty, Harry and James) as well as different models designed for different applications. The model was introduced in 1981, continues in production, and sells well, despite Numatic not retaining a PR agency.

Luigi's Mansion is a 2001 action-adventure game developed and published by Nintendo. The game was a launch title for the GameCube and was the first game in the Mario franchise to be released for the console; it was released in Japan on September 14, 2001, in North America on November 18, 2001, in Europe on May 3, 2002, and in Australia on May 17, 2002. It is the third video game in which Luigi is the main character instead of Mario, after Mario Is Missing! and Luigi's Hammer Toss. Players control him as he explores a haunted mansion to rescue Mario and battles ghosts by capturing them through a vacuum cleaner supplied by Professor E. Gadd.

Luigi's Mansion received a positive critical reception overall, with reviewers praising the gameplay, setting, and soundtrack, though its short length was criticized. The game sold over 3.3 million copies, and is the fifth-best-selling GameCube game of all time. It was one of the first games to be re-released as a Player's Choice title on the system. Initial fan reception to the game was mixed; however, it improved over the years and achieved a cult following. The game was followed by two sequels – Luigi's Mansion: Dark Moon, released for the Nintendo 3DS in 2013, and Luigi's Mansion 3, which was released for the Nintendo Switch in 2019. A remake of Luigi's Mansion for the 3DS, co-developed by Nintendo and Grezzo, was released in 2018. The game was re-released for Nintendo Switch 2 as part of the Nintendo Classics service on Nintendo Switch Online in 2025.

Bissell Inc., also known as Bissell Homecare, is an American privately owned vacuum cleaner and floor care product manufacturing corporation headquartered in Walker, Michigan. The company is the number one manufacturer of floor care products in North America in terms of sales, with 20% marketshare.